TypeScript - Anonymous Functions

Anonymous Functions–

An anonymous function is a function that was declared without any named identifier to refer to it.

Stayed Informed – Learn Angular 2 with TypeScript

Example - Normal function

function printHello() {
    console.log('Hello Anil!');
}

printHello();

Examples - Anonymous function

JavaScript -

var hello = function () {
    console.log('Hello Anil!, I am Anonymous.');
};

hello();//Return - Hello Anil!, I am Anonymous.

OR 

setTimeout(function () {
    console.log('Hello Anil!, I am Anonymous.');
}, 2000); //Return - Hello Anil!, I am Anonymous.

TypeScript –

var anonymousFunc = function (num1: number, num2: number): number {
    return num1 + num2;
}

//RESULT
console.log(anonymousFunc(10, 20)); //Return is 30

//RESULT
console.log(anonymousFunc(10, "xyz")); 
// error: Argument of type 'number' is not assignable to parameter of type 'string'.
//because return type is number for anonymous function).

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Anil Singh is an author, tech blogger, and software programmer. Book writing, tech blogging is something do extra and Anil love doing it. For more detail, kindly refer to this link.. My Tech Blog - https://www.code-sample.com/ My Books - Book 1 and Book 2